Hello everyone!  I realy need your advices!

 My CPU is 313C with modul CP 341-RS232C

With best regards, Dmitry.

Zdravstvuj,

probably I see some missunderstanding, this Moxa adapter converts Ethernet to RS-232/422/485 and vice versa. Don't understand why you make some cable from RJ45 to RS232, this is wrong. Moxa working as Terminal Server, so you need configure it with Moxa SW as you need. On one side you have serial ports where you can attach your CP341 RS-232 cable and on another side of Moxa is Ethernet port which need to be connected to Ethernet device communicating. Nothing special. But your base problem is with CP341 communication, what protocol did you set on CP341 and what other communication settings? This info I missing in your pdf.

Thank you for you reply

This NPORT has two port rs232 but it mades like RJ45 form port. So i connected

MY_PC (ethernet)->Nport (rs232)->CP341 with special cable from moxa site. Yes, fist i must to solve my problem with CP341, because i don;t see leds working. 

Hello,

ok, don't see problem with your cfg of CP341 in my opinion. Understand now with that RJ45 ports for RS-xxx ports. What DB (221?) you have defined as Send and Receive buffer? Recommend structure as Array of Bytes with enough value of elements. In this case is need to have your cable connected to Moxa (hope is good wired!!!), then you can see of course TX/RX flashes. In case of good cfg and download all to CPU, don't see problem for functionality. Important is check DONE, ERROR and STATUS outputs of SEND, DONE or ERROR for TRUE, then you can reset your REQ via simple bit condition f.ex. How you can check PC side incoming message, what SW? Pls again, you need have also Moxa properly configured.

In db221 i used arrray[1..30] of byte

Hello,

again, if your medium is RS-232 you need connect correctly cable to both sides of interfaces. Simply if you unplug your cable from CP341 you can't monitor visualy that LEDs. Therefore I've recommended that. Also another problem in this case has arise, you have defined array of 30 bytes but you send with SEND instruction LEN->50 bytes. This is problem. You don't need save cfg to CP, enough is save complete hw cfg to PLC CPU.

At this momemt i made settings of emulators of the terminal for the send/read the data to/from com port of my PC. If i send something into this port - on the module cp341 flash led TX. It is little step , but i can't read data, also i have no error in function. If i try to send data from PLC have no results;

It is a miracle. Now (after dinner) it is working, i have no changed nothing in HWconfig, only length of data. So, dear, Duris_I, thanks very much for your support!!! :)

I hope this post will be helphul for somebody